GSM Audio Intercom,AC/DC12V-24V Gate Opener Access Controller,ABS Box Rainproof Design,Gate Opener System Provides 2-way Voice,for Home/Office/Hotel

Features: The front panel is installed without screw locking for easy installation. Dual relay output for easy control of door openers or alarm components. Press the remote control relay output through the keyboard while talking to the visitor. The device produces high quality audio calls up to 2 numbers. If the person answering the call wishes to allow access, they simply release the on-board ...